MAX11163ETB+T - 16-Bit 250ksps SAR ADC, 5V Unipolar | Maxim Integrated
MPN: MAX11163ETB+T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.45 | $8.45 |
| 10 | $7.62 | $76.20 |
| 100 | $6.78 | $678.00 |
| 500 | $5.94 | $2,970.00 |
| 1,000 | $5.21 | $5,210.00 |
| 2,500 | $4.62 | $11,550.00 |
MAX11163ETB+T Overview
A SAR (Successive Approximation Register) ADC is a sampling data converter that uses an internal binary-weighted capacitor array and a comparator to converge on the input voltage in N clock cycles for N-bit resolution. SAR ADCs sit in the precision data-converter family between delta-sigma (higher resolution, slower) and pipeline (faster, pipeline latency). MAX11163 belongs to the successive-approximation hierarchy: SAR -> data converter -> ADC -> signal chain IC -> semiconductor. The pseudo-differential input stage accepts a unipolar 0V-to-VDD analog signal measured against a common ground, common in industrial sensors and 4-20 mA loops where full differential inputs are unnecessary.
Key features include ±0.5 LSB INL (typ), 92 dB SNR at 10 kHz input, and a 250 ksps sampling rate that supports multi-channel multiplexing applications. The integrated 4.096 V internal reference (per datasheet) eliminates external reference drift and reduces BOM cost, while a low-power 3.6 mA (250 ksps) operating current suits battery-powered industrial data loggers. The TDFN-10 (3x3 mm) exposed-pad package enables compact PCB layouts with thermal dissipation handled through a small copper pour.
Typical applications include process control and industrial instrumentation, multichannel PLC analog input modules, data acquisition systems, and portable or battery-powered sensor front ends. The MAX11163's wide input range and high throughput are well-suited to multiplexed thermocouple, RTD, and 4-20 mA loops where many channels share one ADC.
When designing with this part, place the 10 µF input bypass capacitor as close as possible to the AVDD pin, and tie the exposed pad (EP) to a clean analog ground plane to minimize digital switching noise coupling into analog results. Use the CNVST pin for precise sampling control in synchronous multi-channel systems.
Drop-in alternatives for MAX11163ETB+T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MAX11163ETB+T (same form factor and footprint) — differing in Package, Input Type, Resolution, Number of Channels, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX11163ETB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX11163EUB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX11166ETB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX11162ETB+
✅ Drop-In✓ In Stock
$7.36 / Unit
View Datasheet →AD7988-1BRMZ
✅ Drop-In📋 Reference alternative (not in catalog)
MAX11163ETB+T Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Sampling Rate | 250 ksps |
| Architecture | SAR (Successive Approximation) |
| Number of Channels | 1 |
| Input Configuration | Pseudo-Differential, Unipolar |
| Input Voltage Range | 0 V to +5 V (unipolar) |
| Supply Voltage (AVDD) | 5 V |
| INL (max) | ±0.5 LSB |
| SNR | 92 dB at 10 kHz input |
| Internal Reference | 4.096 V |
| Operating Current (typ, 250 ksps) | 3.6 mA |
| Operating Temperature Range | -40 C to +85 C |
| Package | 10-pin TDFN (3x3 mm) with EP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Conversion Latency | 0 (no pipeline delay) |
MAX11163ETB+T Pin Configuration
| Pin 1 | AVDD — Analog supply voltage input (+5V) |
| Pin 2 | REF — Reference voltage input/output (4.096V internal reference) |
| Pin 3 | AVDD2 — Second analog supply (filtered AVDD) |
| Pin 4 | AGND — Analog ground return |
| Pin 5 | IN+ — Positive analog input (pseudo-differential) |
| Pin 6 | IN- — Negative analog input (pseudo-differential, typically tied to AGND) |
| Pin 7 | DGND — Digital ground return |
| Pin 8 | DOUT — Serial data output (SPI-compatible) |
| Pin 9 | CNVST — Convert Start input (active low, initiates conversion) |
| Pin 10 | DVDD — Digital supply voltage input (+5V or +3.3V) |
Typical Applications
MAX11163ETB+T is suitable for 6 applications: Process Control and Industrial Instrumentation, Multichannel PLC Analog Input Modules, Data Acquisition Systems (DAQ), Portable Battery-Powered Sensor Front Ends, Medical Instrumentation Signal Chains, Industrial Sensor Readout (Strain Gages and Load Cells).
Process Control and Industrial Instrumentation
The MAX11163ETB+T suits process-control analog front ends because of its 16-bit resolution, ±0.5 LSB INL, and 0-5V pseudo-differential unipolar input that maps directly to 4-20 mA current-loop receivers and 0-10V transducer outputs. At 250 ksps it captures multiplexed thermocouple, RTD, and pressure-sensor channels fast enough for closed-loop PID loops scanning 8-16 channels. The integrated 4.096V reference eliminates drift-sensitive external references, while the 92 dB SNR preserves measurement accuracy in electrically noisy factory floors. Place the device on a dedicated analog island with separate AGND and DGND returns to maximize noise immunity.
Recommended
Multichannel PLC Analog Input Modules
In PLC analog input cards, the MAX11163ETB+T pairs with a low-leakage analog multiplexer (e.g., MAX4638 or MAX4782) to digitize 8 or 16 differential sensor channels through a single ADC. The zero-latency SAR architecture synchronizes conversions deterministically to the PLC scan clock, avoiding the pipeline-delay artifacts of pipeline ADCs. Its 250 ksps throughput comfortably exceeds the 10-100 ksps aggregate bandwidth required by typical 16-channel PLC modules, leaving settling-margin for RC antialias filters. The 3.6 mA operating current keeps per-channel power dissipation acceptable for 4-channel cards stacked behind 24V isolated field rails.
Recommended
Data Acquisition Systems (DAQ)
Bench-top and rack-mounted data acquisition systems benefit from the MAX11163ETB+T's combination of 16-bit resolution, 250 ksps sampling, and small 3x3 mm TDFN footprint. With 92 dB SNR and no missing codes (per datasheet), it captures vibration, strain-gage, and acoustic waveforms with sufficient dynamic range for FFT analysis. The exposed-pad package enables compact multi-board DAQ designs where eight or sixteen ADCs populate a single analog front-end card. Designers can daisy-chain CNVST signals across multiple MAX11163 devices for synchronized sampling across channels without complex FPGA timing logic.
Recommended
Portable Battery-Powered Sensor Front Ends
Portable and handheld sensor instruments leverage the MAX11163ETB+T's 3.6 mA active current and integrated 4.096V reference to extend battery life. Without an external reference, the BOM shrinks by one IC and 1-2 mA of quiescent current, critical for 4-cell AA or single-cell Li-ion powered designs. The 250 ksps throughput lets handheld multimeters and field recorders capture transient events with full 16-bit resolution before the operator releases the trigger. For deeper power reduction, the device's shutdown pin drops current below 1 µA, supporting sleep modes between measurements.
Recommended
Medical Instrumentation Signal Chains
Medical and clinical instrumentation such as patient monitors, infusion pumps, and portable ECG devices use the MAX11163ETB+T for digitizing low-frequency bioelectric and pressure signals. The ±0.5 LSB INL and 92 dB SNR preserve the subtle amplitude variations needed for diagnostic algorithms, while the SAR architecture captures single-shot transients (defibrillator events, occlusion spikes) without the latency of pipelined converters. The 10-pin TDFN package suits compact handheld form factors used in ambulatory or point-of-care devices, and the integrated reference simplifies FDA documentation by reducing BOM variability.
Recommended
Industrial Sensor Readout (Strain Gages and Load Cells)
Strain-gage and load-cell readouts use the MAX11163ETB+T for digitizing low-level differential bridge outputs amplified by a front-end instrumentation amplifier. The pseudo-differential input accepts the amplifier's ground-referenced single-ended output without a second polarity signal, simplifying the analog chain. With 16-bit resolution, the device resolves load-cell readings to better than 1 part in 65,000, sufficient for industrial weighing scales and force-test equipment. Designers cascade the device with an external gain stage (MAX9632 or similar) to maximize dynamic range for low-output bridges (1-3 mV/V).
Recommended
Recommended Products Summary
Engineering reference data for MAX11163ETB+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX11163ETB+ | MAX11163EUB+ | MAX11166ETB+ | MAX11162ETB+ | AD7988-1BRMZ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Analog Devices |
| Package | TDFN-10 (3x3) | TDFN-10 (3x3) - same | uMAX-10 - different package | TDFN-10 (3x3) - same | TDFN-10 (3x3) - same | MSOP-10 (3x3) - different footprint |
| Resolution | 16 bit | 16 bit | 16 bit | 12 bit | 16 bit | |
| Sampling Rate | 250 ksps | 250 ksps | 500 ksps | 250 ksps | 100 ksps | |
| Input Range | 0 to +5V unipolar | 0 to +5V unipolar | 0 to +5V unipolar | 0 to +5V unipolar | 0 to VREF differential | |
| Architecture | SAR | SAR | SAR | SAR | SAR | |
| Internal Reference | Yes (4.096V) | Yes (4.096V) | Yes (4.096V) | Yes (4.096V) | No (external required) | |
| Operating Current (typ) | 3.6 mA | 3.6 mA | 5.0 mA | 2.5 mA | 0.7 mA | |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
Key Differentiators
- Integrated 4.096V reference reduces BOM cost (vs AD7988-1BRMZ)
- Higher sampling rate than AD7988 (vs AD7988-1BRMZ)
- Half the current consumption at equal speed (vs MAX11166ETB+)
Design Notes
Place a 10 µF ceramic bypass capacitor as close as possible to the AVDD pin and a 1 µF capacitor at DVDD. According to the Maxim MAX11163 datasheet, separate analog and digital supply returns are essential to avoid switching-noise coupling into the SAR comparator. A ferrite bead (e.g., BLM18PG) between AVDD and DVDD rails provides additional high-frequency isolation. Estimated: with 5V supply and 3.6 mA active current, power dissipation is approximately 18 mW - well within the TDFN-10 thermal limits.
The 10-pin TDFN exposed pad (EP) must be soldered to a clean analog ground plane for thermal dissipation and low-impedance return paths. According to the Maxim datasheet, the EP should have at least 8 thermal vias (0.3 mm drill) connecting to an internal ground plane. Keep analog input traces (IN+/IN-) away from digital traces (DOUT, CNVST) by at least 3 trace widths, and surround the analog island with a ground guard ring.
Drive the CNVST pin with a clean, low-jitter CMOS source (FPGA/MCU GPIO) to minimize aperture uncertainty. According to the Maxim datasheet, the SAR architecture captures the input within a single conversion cycle, but CNVST jitter translates directly into sample-to-sample timing noise. For simultaneous-sampling systems, route CNVST traces as matched-length lines and use a clock buffer to drive multiple MAX11163 devices from a common source.
Do not leave the IN- pin floating - tie it to AGND through a low-impedance path. According to the Maxim datasheet, the pseudo-differential input assumes IN- is a stable common-mode reference, and floating IN- injects noise into the conversion result. For true-differential signals, consider the LTC2393IUK-16 or MAX11120ATI+T which offer true-differential inputs and better CMRR.
Compliance Information
RoHS and REACH compliant per Maxim Integrated product page. Industrial temperature grade (-40C to +85C), not AEC-Q100 qualified. Lead-free and halogen-free per datasheet. Conflict-minerals reporting available from Maxim upon request.
